Vulnerability CVE-2013-6420
Published: 2013-12-16   Modified: 2013-12-17

Description:
The asn1_time_to_time_t function in ext/openssl/openssl.c in PHP before 5.3.28, 5.4.x before 5.4.23, and 5.5.x before 5.5.7 does not properly parse (1) notBefore and (2) notAfter timestamps in X.509 certificates, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted certificate that is not properly handled by the openssl_x509_parse function.

See advisories in our WLB2 database:
Topic
Author
Date
High
PHP 5.5.6/5.4.22 openssl_x509_parse() Memory Corruption
Stefan Esser
16.12.2013

Type:

CWE-119

 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
PHP -> PHP 
Opensuse -> Opensuse 
Novell -> Opensuse 
Apple -> Mac os x 

 References:
http://forums.interworx.com/threads/8000-InterWorx-Version-5-0-14-Released-on-Beta-Channel
!
http://git.php.net/?p=php-src.git;a=commit;h=c1224573c773b6845e83505f717fbf820fc18415
http://lists.opensuse.org/opensuse-updates/2013-12/msg00125.html
http://lists.opensuse.org/opensuse-updates/2013-12/msg00126.html
http://rhn.redhat.com/errata/RHSA-2013-1813.html
http://rhn.redhat.com/errata/RHSA-2013-1815.html
http://rhn.redhat.com/errata/RHSA-2013-1824.html
http://rhn.redhat.com/errata/RHSA-2013-1825.html
http://rhn.redhat.com/errata/RHSA-2013-1826.html
http://support.apple.com/kb/HT6150
http://www.debian.org/security/2013/dsa-2816
http://www.php.net/ChangeLog-5.php
http://www.securityfocus.com/bid/64225
http://www.securitytracker.com/id/1029472
http://www.ubuntu.com/usn/USN-2055-1
https://bugzilla.redhat.com/show_bug.cgi?id=1036830
https://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c04463322
https://www.sektioneins.de/advisories/advisory-012013-php-openssl_x509_parse-memory-corruption-vulnerability.html
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